# 神経すいじゃく vs Concentration Sushi

The clearest difference is ads: 神経すいじゃく at none against Concentration Sushi's shown. Concentration Sushi's advantage is update cadence (every 3 months vs every 45 months). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

神経すいじゃく ships an update every 45 months, Concentration Sushi every 3 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | 神経すいじゃく | Concentration Sushi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/concentration-sushi/id458072561/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | **100.0% of reviews** | 95.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 45 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 132 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yusuke_sharp9th](https://appshunter.io/developer/409982567) | [Qualia Systems Inc.](https://appshunter.io/developer/388873648) |

## What reviewers say

### 神経すいじゃく

[App page](https://appshunter.io/ios/app/id409982564)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Concentration Sushi

[App page](https://appshunter.io/ios/app/concentration-sushi/id458072561)

Enhance your focus with this memory-based game. Test your recall by matching sushi cards with varying storage times across multiple difficulty levels. Compete with friends via Game Center.

**Highlights:** Memory card matching, Multiple game modes, Adjustable card storage times, Game Center integration, Infinite mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 神経すいじゃく free?

神経すいじゃく is free to download, with no in-app purchases.

### Is Concentration Sushi free?

Concentration Sushi is free to download, with no in-app purchases.

### Do 神経すいじゃく or Concentration Sushi have ads?

Concentration Sushi shows ads; 神経すいじゃく does not.

### Which is updated more often, 神経すいじゃく or Concentration Sushi?

神経すいじゃく ships an update every 45 months, and Concentration Sushi every 3 months. Most recently, 神経すいじゃく was updated on November 1, 2026 and Concentration Sushi on November 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*